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항공사진을 이용한 방포항 인근 해빈의 장기간 해안선 변화 분석
김백운 ( Baeck Oon Kim ),윤공현 ( Kong Hyun Yun ),이창경 ( Chang Kyung Lee ) 대한원격탐사학회 2013 大韓遠隔探査學會誌 Vol.29 No.5
장기간 해안선 변화 자료의 구축을 통해 해안선의 시·공간적인 변화 양상을 분석하고, 이에 근거하여 해안침식의 향후 경향을 파악하는 일은 연안관리에 매우 중요한 역할을 한다. 본 연구에서는 수치항공사진을 이용하여 방포항 인근 해안지역의 장기간(1985년 ~ 2009년) 해안선 변화 탐지를 위해 항공삼각측량, 지상기준점측량, 수치도화, 그리고 해안선 변화율을 산정하였다. 그 결과 방포해빈과 꽃지해빈의 해안선은 각각 0.2 m/yr와 최대 0.8 m/yr로 침식된 것으로 파악되었다. 또한 등고선 변화 통하여 꽃지 해빈의 북부지역에서 침식현상이 가장 뚜렷하게 나타났으며 표고 1 m 간격의 등고선은 최대 45 m 후퇴하였음을 알수 있었다. 이러한 변화는 다양하고 복합적인 요인에 의해 발생할 수 있으며 주된 요인은 1990년대 말에 설치된 해변 옹벽이 해안침식을 일으키는 주요 원인으로서 추정되고 있다. To analyze tendency of temporal and spatial change of shorelines and to estimate rate of shoreline changes using long-term shoreline change data is very important for the coastal environmental management. In this study, investigation was conducted to estimate the rate of shoreline changes using long-term shoreline change data from the year 1985 to 2009 aerial photographs. In this process aerial triangulation, GPS surveying and digital mapping was done for the estimation of changes. As the results, shorelines of Bangpo and Kkotji Beach retreated at a maximum rate of 0.2 m/yr and 0.8 m/yr, respectively. The shoreline could be changed by various factors. However, it was presumed that coastal erosion has been mainly affected by retaining wall constructed in the late 1990s.
이창경(Lee Chang Kyung),김백운(Kim Baeck Oon),김남용(Kim Nam Yong) 대한공간정보학회 2007 대한공간정보학회지 Vol.15 No.2
본 논문은 해안매립 이전과 이후에 촬영한 한 쌍의 항공사진을 이용하여 매립지에 대한 해안선 변화 분석을 제시한다. 해석도화기와 수치도화기의 두 가지 방법으로 조위, 즉 약최고고조면으로 정의된 해안선을 도화하였다. 과거의 해안선을 수치지적도에 중첩하여 포락지와 해안빈지의 면적을 계산하였고, 과거와 현재의 해안선 사이의 면적을 측정함으로써 해안선 변화량을 추정하였다. 면적에 근거한 해안선 변화 비교 결과, 두 사진측량 방법은 대체로 일치함을 보여주었다. 그러나 수치사진측량에 있어서 복잡한 지형을 보이는 하구지역의 해안선 도화는 1200dpi보다 높은 해상력의 수치영상이 요구된다. This paper presents a shoreline change analysis on a reclaimed land, using a pair of aerial photographs taken before and after the reclamation. Shorelines that are defined by a tide datum, i.e. Approximately Highest High Water Level, were mapped by both analytical and digital photogrammetric methods. The past shorelines were overlapped with digital cadastral map from which areas of retracted and protruded lands were computed. Magnitude of shoreline changes was estimated by calculating areas between the past and present shorelines. Comparisons in terms of areas showed a fairly good agreement between the two methods. However, particularly in the estuary of complex morphology, shoreline mapping by digital photogrammetric method requires images to be scanned at a resolution higher than 1200 dpi.
李昌炅(Chang-Kyung Lee) 아시아민족조형학회 2011 아시아민족조형학보 Vol.10 No.1
In ancient times, it was the authors who produced knowledge, but it was masters craftsman who produced media for delivering produced knowledge. If it had not been for the masters who produced traditional books, there would have not been transmission of knowledge. The purpose of this study is to look over master system which had been in charge of production of traditional books in ancient Korean times, and to review the policies and conditions taken to preserve functions that the master system had developed. In Chosun Dynasty, the Kyeong Kook Dae Jeon, the national law books, stipulates manpower to publish traditional books, which in turn means it was a very specialized area. In addition, a printing supervisor and a proofreading supervisor were appointed to make it sure there should be no typos and errors in content. This is an important element that makes it possible to produce high quality books. When this tradition faced danger of disappearance, the government enacted a law on intangible cultural assets in 1962 to designate, protect and cultivate intangible cultural assets such as master craftsman of paper, master craftsman of metal type, master craftsman of wooden type, and master craftsman of side graft, etc. The action was positive that it was an opportunity to stop severance of functions in one hand. On the other hand, some questions have been raised regarding spread of functions. Many local governments hold festivals for the purpose of linking with cultural industry, turning into tourism products, and diffusion of traditional culture. However, the festivals are led by governments and there are not enough programs for residents to participate in. National Research Institute of Cultural Heritage supplies visual aids and books that show actual scenes of important intangible cultural heritages. This project needs experts" participation for the improvement of quality and diffusion of intangible cultural heritages. It is required that the preservation and transmission of intangible cultural heritages to be free from practical and commercial consideration. It is required that the preservation and transmission of intangible cultural heritages to be pushed ahead with a pure purpose: conservation and preservation of tradition.
이창경(Lee, Chang Kyung),박민호(Park, Min Ho),이영진(Lee, Young Jin) 한국지적학회 2017 한국지적학회지 Vol.33 No.3
본본 연구는 삼각측량의 기하학적 원리에 기반한 근사조정법과 엄밀조정법(최소제곱법)의 수학모델을 검토하고, 사각망의 실용 관측값을 근사조정법과 엄밀조정법에 적용하고, 그 결과를 비교 분석하여 삼각측량 근사조정법의 유효성을 제시하였다. 궁극적으로는 학생들에게 삼각측량에 의한 위치결정 방법을 가르침에 있어 학술적 원리를 명확히 이해시키기 위한 수학적 근거를 제시한다는 점에 본 연구의 목적이 있다. This study reviews the mathematical models of triangulation network adjustment in cadastral surveying based on geometrical principles, practical observations of quadrilateral triangular network are applied to approximate adjustment method and rigorous adjustment method(least squares method), and compares the solutions to check the effectiveness of the approximate adjustment method. As a result of this study, the validity of approximate method of triangulation network adjustment is proved in practical use. The purpose of this study is to provide students with a mathematical basis for clearly understanding academic principles in teaching location methods by triangulation.